The final film of the television series "The Adventures of Sherlock Holmes and Dr. Watson." It is based on the late and little-known stories of Arthur Conan Doyle, united by the theme of the approaching world war and the struggle of the legendary detective with foreign spies.

This film version was released before the premiere of the full two-part television version (The Adventures of Sherlock Holmes and Dr. Watson: The Twentieth Century Approaches). In this version the entire plot of the story Bruce-Partington Drawings was deleted.